About: http://webisa.webdatacommons.org/193017359

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	The receiver was a telephone receiver, but the sender was a vibrating buzzer coupled to the line through a transformer (like an induction coil), operated by a key in the usual way.
http://www.w3.org/ns/prov#wasQuotedFrom	du.edu